How To Fix MC671 - Activation currently locked by user &

SAP Error Message - Details

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 671

• Message text: Activation currently locked by user &

What causes this issue?

An activation lock is always set when an activation is started for a
single ABAP/4 Dictionary object or with the mass activating program.
This inhibit should prevent objects of different object classes from
being activated in parallel, which could cause an inconsistency in the
ABAP/4 Dictionary. The lock is automatically cancelled after the
activation. The lock initially remains active when an activation is
cancelled. It removes itself after approx. 10 minutes.

System Response

The activation request is rejected.

How to fix this error?

Repeat the activation after a few minutes.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MC671 - Activation currently locked by user & ?

  The SAP error message "MC671 Activation currently locked by user &" typically occurs in the context of the Material Management (MM) or Production Planning (PP) modules when a user attempts to activate a data object (like a material master or a production order) that is currently locked by another user. This locking mechanism is in place to prevent data inconsistencies that could arise from concurrent modifications.
  Cause:
  
  User Lock: Another user is currently editing or has locked the data object you are trying to access.
  Session Timeout: A previous session may not have released the lock due to a timeout or an unexpected termination.
  Background Jobs: A background job may be running that is holding the lock on the data object.
  System Issues: Occasionally, system issues or bugs can lead to locks not being released properly.
  
  Solution:
  
  Wait and Retry: If the lock is held by another user, the simplest solution is to wait until that user completes their task and releases the lock.
  Identify the Locking User: You can use transaction code SM12 to view and manage locks. This transaction allows you to see which user is holding the lock and on which object.
  
  Go to transaction SM12.
  Enter the relevant user ID or leave it blank to see all locks.
  Check the list for the locked object.
  
  
  Release the Lock: If you have the necessary authorizations and it is appropriate to do so, you can manually delete the lock held by the other user. Be cautious with this approach, as it may lead to data inconsistencies if the other user is actively working on the data.
  Check Background Jobs: If a background job is causing the lock, you may need to wait for it to complete or check with your system administrator to see if it can be terminated.
  Contact Support: If the issue persists and you cannot identify the cause, consider reaching out to your SAP support team for further assistance.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage locks.
  SM21: To check system logs for any related errors or issues.
  SM37: To monitor background jobs that might be causing locks.
  
  
  User Authorizations: Ensure that you have the necessary authorizations to view and manage locks in the system.
  Documentation: Refer to SAP documentation or help resources for more detailed information on locking mechanisms and best practices for managing locks.
  
  By following these steps, you should be able to resolve the "MC671 Activation currently locked by user &" error effectively.